Best Invoicing Software for UK Freelancers and Sole Traders

Finding the right invoicing software can save you hours every month and keep you on the right side of HMRC. For UK freelancers and sole traders, the stakes are even higher — you need tools that handle Making Tax Digital (MTD), connect to UK bank accounts, and won't cost a fortune when you're just starting out.

We've reviewed the leading options available in the UK to help you choose the best fit for your business. Whether you're a graphic designer, a plumber, or a consultant, there's a solution here for you.

What to Look for in Invoicing Software

Before diving into our picks, it's worth knowing what separates a genuinely useful tool from one that creates more admin than it saves. UK freelancers should prioritise MTD compliance, straightforward VAT handling, and solid bank feeds from providers like Barclays, HSBC, or Monzo.

Making Tax Digital (MTD) compatibility for VAT and Income Tax
UK bank integrations for automatic transaction matching
GDPR-compliant data handling and UK or EU-based data storage
Simple invoice creation with your own branding
Mobile access for invoicing on the go

Our Top Picks

FreeAgent — Best Overall for Sole Traders

FreeAgent costs £19 per month and is arguably the strongest all-round choice for UK sole traders and freelancers. It's fully HMRC Making Tax Digital compliant, supports Self Assessment tax returns, and connects seamlessly with major UK banks including NatWest and Royal Bank of Scotland — where it's actually free if you hold a business account with them.

The invoicing tools are clean and intuitive, letting you send branded invoices, set up automatic payment reminders, and track what's been paid at a glance. For freelancers who want one tool to handle invoicing, expenses, and tax all in one place, FreeAgent is hard to beat.

Xero — Best for Growing Freelancers

Xero starts at £15 per month and is one of the most widely used accounting platforms among UK small businesses. It's MTD compliant for VAT and offers an exceptionally user-friendly interface that doesn't require an accounting background to navigate confidently.

Xero's invoicing features include automatic payment reminders, Stripe and GoCardless integrations for getting paid faster, and a strong ecosystem of add-ons. If your freelance work is growing into something bigger, Xero scales with you far more gracefully than most competitors.

Sage Accounting — Best for Familiar, Reliable Invoicing

Sage Accounting is available from £15 per month and carries the weight of one of the UK's most established accounting brands behind it. It's fully MTD compliant for VAT submissions and offers excellent UK bank integrations, making bank reconciliation far less painful than doing it manually.

For sole traders who prefer working with software that has strong UK support and a proven track record, Sage is a reassuring choice. It's particularly well suited to tradespeople and service businesses who invoice regularly and need reliable reporting.

Square — Best Free Option for Simple Invoicing

Square offers a genuinely useful free tier that includes invoice creation and integrated payment processing. There are no monthly fees — Square makes its money through transaction fees, which are transparently priced for UK users.

If you're a freelancer who only needs to send occasional invoices and wants to accept card payments without a complicated setup, Square is an excellent starting point. It won't replace a full accounting platform, but for straightforward invoicing paired with a Zettle or SumUp-style payment experience, it gets the job done.

What About Field Service Businesses?

If you're a sole trader working in the trades — plumbing, electrical, landscaping — you may need more than basic invoicing. Tools like Jobber (from £49 per month) and Commusoft (from £119 per month) combine quoting, scheduling, and invoicing into one workflow built specifically for field service businesses.

These are more of an investment, but they can dramatically reduce admin time if your work involves site visits, quotes, and job tracking. Commusoft in particular is tailored for UK trades businesses and includes robust scheduling and mobile access for teams on the road.

Our Recommendation

For most UK freelancers and sole traders, FreeAgent offers the best combination of price, MTD compliance, and ease of use. If you're VAT registered or expect to grow, Xero is worth the investment for its flexibility and integrations.

If budget is tight and your invoicing needs are simple, start with Square's free tier and upgrade as your business grows. The most important thing is to get a system in place before Making Tax Digital for Income Tax becomes mandatory — preparation now will save significant stress later.